First annual outage starts at Olkiluoto 3 on Saturday
The Olkiluoto 3 plant unit (OL3) will be disconnected from electricity production on Saturday, 2 March, for a service outage. The estimated duration of the outage is about 37 days. It will be the first annual outage at the new plant unit. Production at full power output started at OL3 in March 2023, i.e., one year ago.The time reserved for the annual outage of OL3 is 37 days. The long duration is explained, for example, by the technical characteristics of the plant type and the large number of periodic tests and maintenance activities to be carried out during the service outage. As OL3 is